Wireless Power Receiver Coil with Extended Core for Non-Parallel Charging
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Solution Overview
Problem
Wireless power charging technologies face limitations in efficiency due to requirements for direct and parallel positioning of wireless power transmitter and receiver, which restricts effective charging, especially in wearable devices with non-parallel orientations.
Innovation Solution
A wireless power receiver design featuring a receiving coil wound around a core part, with magnetic sheets and a fixing part, allowing for efficient magnetic coupling even at non-parallel angles, enhancing charging efficiency and flexibility in device orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If wireless power transmitter and receiver are positioned directly opposite each other in parallel relation, then charging efficiency is improved, but device orientation flexibility deteriorates
Solution Approach 1:
The receiving coil is configured to extend in the width direction of the internal part rather than the length direction, changing the spatial orientation dimension. This allows the coil to be positioned perpendicular to the transmitting coil while maintaining efficient magnetic coupling through the extended core structure that spans across the width of the device.
Solution Approach 2:
The core part is designed to extend from a lateral edge of the internal part to accommodate dynamic positioning. This extension allows the receiving coil to maintain effective magnetic coupling with the transmitting coil even when the device orientation changes, providing adaptability to various charging positions and angles.
2Adaptability or versatility
If receiving coil is wound around core part extending from lateral edge of internal part, then adaptability to various device orientations is improved, but device complexity increases
Solution Approach 1:
The core part is integrated directly with the internal part of the wireless device, merging the magnetic core structure with the device housing or component. This integration eliminates the need for separate magnetic core components and simplifies assembly while maintaining the extended configuration needed for orientation flexibility.
Solution Approach 2:
The extended core structure serves multiple functions: it provides magnetic flux path, structural support, and orientation adaptability. By making the core part multi-functional, the design achieves orientation flexibility without adding separate components that would increase device complexity.
3Loss of energy
If core part is extended from lateral edge of internal part, then magnetic coupling at non-parallel angles is improved, but manufacturing precision requirements increase
Solution Approach 1:
The core part is pre-configured with a specific extension length and orientation during manufacturing, optimized for the typical charging scenario. This preliminary configuration ensures that even with normal positioning variations, the magnetic coupling remains effective, reducing the stringency of precision requirements during final assembly.
Solution Approach 2:
The core part dimensions, particularly the extension length from the lateral edge, are optimized to provide a tolerance buffer. By adjusting these parameters, the design accommodates manufacturing variations and positioning tolerances while maintaining sufficient magnetic coupling efficiency across different orientations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enables stable and efficient wireless charging in wearable devices by maintaining strong magnetic coupling between coils, even when the device is positioned at non-parallel angles, thus increasing charging speed and flexibility in device orientation.
Implementation Method 1
a receiving coil wound around a core part
Implementation Method 2
A magnetic sheet may be attached to a surface of the internal part, wherein the core part is attached to a surface of the magnetic sheet
Data Source
AI summary
A wireless power receiver included in a device, the wireless power receiver including a core part fixed to be adjacent to a surface of an internal part; a receiving coil wound around the core part; and a power circuit configured to provide power received from the receiving coil to the wearable device.